Markedman
Well-known member
I have a quad of 1970 RCA 6l6 tubes that I tested, they tested very strong and matched. So I put them in my boogie 50-50 power amp and I was blown away at the difference. I had to turn down the treble and the volume was perceivably louder. I was overjoyed until I realized, I’m not supposed to use anything but Boogie tubes. The mA is in the 50s whereas the boogie tubes are in the 20s. I did switch them out and put the boogie tubes back in but it’s been on my mind and I’m thinking about getting the $50 mod that’s available for the power amp. What damage am I doing by using the higher mA tubes?